Tools

Shack tools

Fast calculators that run entirely in your browser. Nothing you type is sent anywhere.

Local date and time

UTC date and time

Now: UTC · local ()

Latitude (°, north +) Longitude (°, east +)

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Your location stays on your device.

From gridTo grid

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Great-circle (short path) from grid-square centers.

Frequency (MHz)

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Classic 468/f and 234/f formulas. Trim to resonance with an analyzer.

Watts

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Text Speed (WPM)